As you've already changed the EWS and Siemens 2000 EMS, are you also using the IPK and LSM from your original car or from the ZT190?
The main problem will be if there are any VIN mismatches on the normally non reconfigurable ECU's of the car. (IPK, EWS, Siemens 2000 and LSM) If all those VIN numbers match, then you should be able to configure the other ecu's on T4 without any problem, otherwise it won't
What ZCS codes have you got on the readable ecu's on T4 on the vehicle configuration screen? If you can post them up I'll be able to see what's happening
Russ